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8 Energy – forces doing work

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Question 3

A rope pulls a rescue sled at constant speed across two sections of snow. The rope acts in the direction in which the sled moves. Across the first section, the rope exerts a force of 90 N for 4.0 m. The sled then moves 8.0 m across the second section. The rope transfers a total of 1000 J of energy across both sections. How much force does the rope exert across the second section?

[1]
A

80 N80\ \mathrm{N}80 N

B

160 N160\ \mathrm{N}160 N

C

83 N83\ \mathrm{N}83 N

D

125 N125\ \mathrm{N}125 N

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8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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